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Chapter 2 System Overview
Compaq Deskpro EXS and Workstation 300 Personal Computers
Featuring the Intel Pentium 4 Processor
First Edition – December 2000
2-10
2.4.1 PENTIUM 4 PROCESSOR
These systems feature the Intel Pentium 4 processor featuring Intel’s NetBurst Micro-
Architecture. This processor is backward-compatible with software written for the Pentium III/II,
Pentium MMX, Pentium Pro, Pentium, and x86 microprocessors.
Key features of the Pentium 4 processor include:
♦ Hyper-Pipelined Technology for higher performance
♦ Rapid Execution Engine with increased throughput and reduced latency
♦ Quad-pumped Front Side Bus (FSB) for balanced performance with RDRAM
♦ Execution Trace Cache for more efficient branch-handling
♦ Improved dynamic execution for higher efficiency
♦ Additional Streaming SIMD Extensions (SSE2) for increased video, audio, and speech
processing
♦ On-die (full speed) 256-KB ECC second-level cache
These systems employ a PGA423 zero-insertion-force (ZIF) socket designed for mounting a “Flip-
Chip” (FC-PGA423) processor package (Figure 2-7).
Figure 2–7. Processor Assembly And Mounting
The PGA423 socket allows easy changing/upgrading of the processor. Raising the Lock/Unlock
handle of the socket in the vertical position allows the processor package to be removed or inserted
into the socket. Lowering the Lock/Unlock handle in the down (horizontal) position locks the
processor package in place. The heat sink is placed on top of the processor and held in place by
two retaining clips.
Heat Sink
FC-PGA423
Package
PGA423
Socket
Heat Sink
Retaining Clip
Lock/Unlock
Handle
(Shown in unlock position)
Heat Sink
Retaining Clip